document.write( "Question 129898: A number that is a palindrome reads the same foward and backward. 90 three-digit palindromes and 90 four-digit palindromes exist. How many five-digit palindromes exist? \n" ); document.write( "
Algebra.Com's Answer #94870 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! for each of the 90 four-digit palindromes, any one of ten digits can be inserted in the center, \n" ); document.write( "__ forming a five-digit palindrome\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "90 four-digit palindromes using 10 center digits gives 900 five-digit palindromes \n" ); document.write( " |